Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/utilities/SystemDictionaryHelper.java @ 271:818a18cd69a8
6730514: assertion failure in mangling code when expanding by 0 bytes
Summary: An expansion by 0 bytes was not anticipated when the assertion was composed.
Reviewed-by: jjh, jcoomes, apetrusenko
author | jmasa |
---|---|
date | Wed, 30 Jul 2008 11:54:00 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
line wrap: on
line source
/* * Copyright 2002-2005 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ package sun.jvm.hotspot.utilities; import java.util.*; import sun.jvm.hotspot.oops.*; import sun.jvm.hotspot.memory.*; import sun.jvm.hotspot.runtime.*; public class SystemDictionaryHelper { static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(); } }); } private static synchronized void initialize() { klasses = null; } // Instance klass array sorted by name. private static InstanceKlass[] klasses; // side-effect!. caches the instance klass array. public static synchronized InstanceKlass[] getAllInstanceKlasses() { if (klasses != null) { return klasses; } final Vector tmp = new Vector(); SystemDictionary dict = VM.getVM().getSystemDictionary(); dict.classesDo(new SystemDictionary.ClassVisitor() { public void visit(Klass k) { if (k instanceof InstanceKlass) { InstanceKlass ik = (InstanceKlass) k; tmp.add(ik); } } }); Object[] tmpArray = tmp.toArray(); klasses = new InstanceKlass[tmpArray.length]; System.arraycopy(tmpArray, 0, klasses, 0, tmpArray.length); Arrays.sort(klasses, new Comparator() { public int compare(Object o1, Object o2) { InstanceKlass k1 = (InstanceKlass) o1; InstanceKlass k2 = (InstanceKlass) o2; Symbol s1 = k1.getName(); Symbol s2 = k2.getName(); return s1.asString().compareTo(s2.asString()); } }); return klasses; } // returns array of instance klasses whose name contains given namePart public static InstanceKlass[] findInstanceKlasses(String namePart) { namePart = namePart.replace('.', '/'); InstanceKlass[] tmpKlasses = getAllInstanceKlasses(); Vector tmp = new Vector(); for (int i = 0; i < tmpKlasses.length; i++) { String name = tmpKlasses[i].getName().asString(); if (name.indexOf(namePart) != -1) { tmp.add(tmpKlasses[i]); } } Object[] tmpArray = tmp.toArray(); InstanceKlass[] searchResult = new InstanceKlass[tmpArray.length]; System.arraycopy(tmpArray, 0, searchResult, 0, tmpArray.length); return searchResult; } // find first class whose name matches exactly the given argument. public static InstanceKlass findInstanceKlass(String className) { // convert to internal name className = className.replace('.', '/'); SystemDictionary sysDict = VM.getVM().getSystemDictionary(); // check whether we have a bootstrap class of given name Klass klass = sysDict.find(className, null, null); if (klass != null) { return (InstanceKlass) klass; } // check whether we have a system class of given name klass = sysDict.find(className, sysDict.javaSystemLoader(), null); if (klass != null) { return (InstanceKlass) klass; } // didn't find bootstrap or system class of given name. // search through the entire dictionary.. InstanceKlass[] tmpKlasses = getAllInstanceKlasses(); // instance klass array is sorted by name. do binary search int low = 0; int high = tmpKlasses.length-1; int mid = -1; while (low <= high) { mid = (low + high) >> 1; InstanceKlass midVal = tmpKlasses[mid]; int cmp = midVal.getName().asString().compareTo(className); if (cmp < 0) { low = mid + 1; } else if (cmp > 0) { high = mid - 1; } else { // match found return tmpKlasses[mid]; } } // no match .. return null; } }